A New Bit Allocation Algorithm in OFDM System

A new adaptive bit and power allocation algorithm in single user OFDM system is proposed.At the request of object BER,the bit allocation algorithm is used in two steps to allocate appropriate bits to each subcarrier,finally the sum power is minimized.The simulation results shows that the performance of the proposed algorithm is approaching to that of the optimization method,and the complexity of the algorithm is greatly reduced.